<template>
  <view class="tui-collapse" :style="{ backgroundColor: bgColor }">
    <view class="tui-collapse-head" :style="{ backgroundColor: hdBgColor }" @tap.stop="handleClick">
      <view class="tui-header" :class="{ 'tui-opacity': disabled }">
        <slot name="title"></slot>
        <view
          class="tui-collapse-icon tui-icon-arrow"
          :class="{ 'tui-icon-active': isOpen }"
          :style="{ color: arrowColor }"
          v-if="arrow"
        ></view>
      </view>
    </view>
    <view
      class="tui-collapse-body_box"
      :style="{ backgroundColor: bdBgColor, height: isOpen ? height : '0rpx' }"
    >
      <view
        class="tui-collapse-body"
        :class="{
          'tui-collapse-transform': height == 'auto',
          'tui-collapse-body_show': isOpen && height == 'auto',
        }"
      >
        <slot name="content"></slot>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  name: 'tuiCollapse',
  emits: ['click'],
  props: {
    //collapse背景颜色
    bgColor: {
      type: String,
      default: 'transparent',
    },
    //collapse-head 背景颜色
    hdBgColor: {
      type: String,
      default: '#fff',
    },
    //collapse-body 背景颜色
    bdBgColor: {
      type: String,
      default: 'transparent',
    },
    //collapse-body实际高度 open时使用
    height: {
      type: String,
      default: 'auto',
    },
    //索引
    index: {
      type: Number,
      default: 0,
    },
    //当前索引，index==current时展开
    current: {
      type: Number,
      default: -1,
    },
    // 是否禁用
    disabled: {
      type: [Boolean, String],
      default: false,
    },
    //是否带箭头
    arrow: {
      type: [Boolean, String],
      default: true,
    },
    //箭头颜色
    arrowColor: {
      type: String,
      default: '#333',
    },
  },
  watch: {
    current() {
      this.updateCurrentChange();
    },
  },
  created() {
    this.updateCurrentChange();
  },
  data() {
    return {
      isOpen: false,
    };
  },
  methods: {
    updateCurrentChange() {
      this.isOpen = this.index == this.current;
    },
    handleClick() {
      if (this.disabled) return;
      this.$emit('click', {
        index: Number(this.index),
      });
    },
  },
};
</script>

<style scoped>
@font-face {
  font-family: 'tuiCollapse';
  src: url(data:application/font-woff;charset=utf-8;base64,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)
    format('woff');
  font-weight: normal;
  font-style: normal;
}

.tui-collapse-icon {
  font-family: 'tuiCollapse' !important;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.tui-icon-arrow:before {
  content: '\e600';
}

.tui-icon-arrow {
  font-size: 32rpx;
  transform: rotate(0);
  transform-origin: center center;
  transition: all 0.3s;
  position: absolute;
  top: 50%;
  margin-top: -8px;
  right: 30rpx;
}

.tui-arrow-padding {
  padding-right: 62rpx;
  box-sizing: border-box;
}

.tui-icon-active {
  transform: rotate(180deg);
  transform-origin: center center;
}

.tui-header {
  position: relative;
  z-index: 2;
}
.tui-collapse-body_box {
  transition: all 0.25s;
  overflow: hidden;
}
.tui-collapse-body {
  transition: all 0.25s;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.tui-collapse-transform {
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateY(-40%);
  transform: translateY(-40%);
}

.tui-collapse-body_show {
  opacity: 1;
  visibility: visible;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}

.tui-opacity {
  opacity: 0.6;
}
</style>
